The largest ever Tube advertising screens have been built at Canary Wharf station, where passengers will be greeted by mayor Sadiq Khan's "London is open" campaign.

Transport for London and Exterion Media lanched the two 7.2m x 4m double-sided screens inside the station today as part of the mayor’s "London is open" campaign.

The inaugral work for the campaign at Canary Wharf is an artwork by Mark Titchner called "No them only us".

The screens, which were designed in collaboration with the station’s architects Foster & Partners, suspend from the ceiling in the main ticket hall and are viewable by more than one million people who pass through the station each week, according to TfL.

The "London is open" work will run on the screens until 30 October. From 31 October, the screens will feature six ten-second slots for commercial advertising.

Khan said: ‎"These new screens are a key part of an innovative media contract that will not only be a great opportunity for advertisers, but will help us to generate more than a billion pounds to reinvest into our transport network.

"I'm delighted that they've chosen to mark this exciting new partnership by screening our message that London ‎is open, and we hope these screens will soon be sought after."